化学剂吞吐稠油油藏组分模型模拟器研究

Compositional simulator study of chemical soaking in heavy oil reservoir

方法根据室内物理模拟结果．建立化学剂吞吐稠油的渗流数学模拟和理论．研制了适合化学剂吞吐稠油油藏的三维两相五组分模型模拟器。目的提高稠油油田冷采加化学剂吞吐开采效果。结果化学剂吞吐浓度为3000mg／L，注入段塞尺寸等于0．02PV或0．03PV时，驱油效果较好。单井吞吐可采用0．03PV、吞吐99d的方案；五点井网采用吞吐井注入0．02PV、吞吐69d的方案。玉东1井组采用网格布井开发．即布井1～25口（五点或反九点）、吞吐井4～15口。结论稠油油田冷采加化学剂吞吐开采所建立的渗流数学模型理论和方法．反映了化学剂吞吐稠油渗流的过程及物理化学作用关系．是一个实用的组分模型．并具有广泛的应用价值；同时也说明了玉东1井采用化学剂吞吐驱油是可行的。

Method According to laboratory result of physical simulation, mathematical simulation and theory of percolation were set up for heavy oil reservoirs soaked by chemical agent,a simulator of 3-D, 2-phase, and 5-component was also developed for heavy oil reservoirs suitable for chemical soaking. Purpose To improve the recovery result of heavy oil reservoir developed by nonthermal process of chemical adding. Result Oil displacement result will be better when chemical density is 3 000 mg/L, and the sizes of injected slugs are 0. 02PV or 0. 03 PV. For single well soaking, 0. 03 PV and 99 d are feasible; for five-spot flood system, 0. 02 PV and 69 d are feasible. Well group 1 in Yudong adopted grid pattern, i. e.12 ～ 25 wells (five-spot or inverted nine-spot pattern )and 4 ～ 15 soaking wells. Conclusion Mathematical simulation theory and method of percolation for chemical soaking development in heavy oil reservoir reflects a process of percolation and relation between physical and chemical action. This compositional simulator is practical and widely applicable; it is also feasible for well Yudong 1 to displace oil by chemical soaking.